The historical epic is a genre unto itself. Movies in this category are often defined by their scope and scale. They usually boast an incredibly long runtime and are grounded in historical realism. Although inaccuracies may occur for the sake of the story, some of cinema's greatest epics steal their key character beats and narrative conflicts from real life. It's a genre that has been present throughout almost every era of film history, and there's a timeless quality to the productions.
Source：https://www.cbr.com/10-best-historical-epics-according-to-rotten-tomatoes/
